问题 解答题 口算.0.2×O.5=2.13×4=2.7×0.2=0.02×7=2.6×0.5=0.8×50=2.4×5=0×1.34= 答案 0.2×O.5=0.12.13×4=8.522.7×0.2=0.540.02×7=0.142.6×0.5=1.30.8×50=402.4×5=120×1.34=0